城市地下停车场设计中的耐久性问题

DURABILITY CONCERNS IN THE PROCESS OF DESIGN AND CONSTRUCTION OF UNDERGROUND PARKING

寒冷地区冬季除冰盐随车带入停车场等将逐步侵蚀混凝土结构,通常被认为宽度在0.2mm以内对结构承载力无害的裂缝、微裂缝和孔隙往往成为侵蚀性介质进入混凝土的通道,给结构耐久性带来隐患;并从材料、结构、施工等方面提出提高这类混凝土结构耐久性的措施。

Because of the slow discharge of the high density of CO2, heavy humidity, and ice salt which is brought by cars into parking in cold area in winter, the concrete will be corroded progressively. Usually, the cracks within 0.2mm in width are considered to be harmless. Little cracks and hole in the concrete of the bearing structure is exactly the way where the external aggressive medium enters mtothe concrete and brings the hidden danger to the structural durability. Some methods of improving and preventing the carbonation of concrete are mentioned in this article to improve the durability of underground garages.